Debugging ISDN
451
00:29:50: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:1, changed state to up
00:29:50: BRI 0 B2: Set bandwidth to 64Kb
00:29:50: BRI: enable channel B2
00:29:50: BRI0:MC145572 state handler current state 3
actions 1 next state 3
00:29:50: BRI0:Starting activation
00:29:50: %LINK-3-UPDOWN: Interface BRI0:2, changed state
to up.!!!
Success rate is 60 percent (3/5), round-trip min/avg/max =
36/41/52 ms
00:29:50: BRI: enable channel B2
00:29:50: BRI0:MC145572 state handler current state 3
actions 1 next state 3
00:29:50: BRI0:Starting activation
00:29:50: BRI 0 B2: Set bandwidth to 64Kb
00:29:51: %LINEPROTO-5-UPDOWN: Line protocol on Interface
BRI0:2, changed state to up
debug isdn q921
The q.921 protocol addresses Layer 2 of the OSI model and its relationship
to ISDN. Information regarding the D channel interface is available via the
debug isdn q921
command.
The D channel is always connected in ISDN, and the channel is used for sig-
naling between the switch and local ISDN device. Connections over the B chan-
nels cannot occur without signaling commands on the D channel.
Administrators should use this command to monitor the proper flow of mes-
sages when calls do not connect. It is recommended that a baseline debug be per-
formed and recorded to compare against suspected problem debug output.
Bottom#debug isdn q921
ISDN Q921 packets debugging is on
00:19:15: ISDN BR0: TX -> RRp sapi = 0 tei = 92 nr = 12
00:19:64424550400: ISDN BR0: RX <- RRf sapi = 0 tei = 92
nr = 12
Bottom#ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2
seconds:
.
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